Well here are some reasons to dislike drury:
(1) Drury makes it harder to bid your minor suit over 1M. Most people don't open very light in the minors, and some don't play weak two bids, so "good hand with a minor" is not unusual.
(2) Playing drury means you have to use 1NT = semi-force over 1M basically. This reduces the frequency that you get to play 1NT, and forces you to sometimes play 2M on a 5-2 fit with two balanced hands. It also creates issues if you open 1M on a four-card suit in 3rd/4th on a
decent hand, since you can't comfortably pass 1NT nor can you bid anything over it.
(3) Some people use Drury as basically a psychic control. I would go so far as to say that if there is a 2-level rebid that
absolutely bars partner from bidding on, even if partner has a hand that would be an obvious game bid opposite a first seat opening, that it's really a psychic control.
(4) Two-way drury is basically telling opponents to balance, when opener rejects the 4-card raise.
On the other hand, I certainly wouldn't want to trade drury for "constructive raises by passed hand" since I think constructive raises are an
awful convention, much worse than drury...
With all this said, I play drury in partnerships where our third seat opening style is markedly different from our first seat style (which is many, but not all, of my partnerships).
Adam W. Meyerson
a.k.a. Appeal Without Merit